Extraction and dephenolization device for phenol-containing wastewater treatment

Abstract

The utility model discloses an extraction dephenolization device for phenol-containing wastewater treatment, which comprises a tower body, a plurality of partition plates are arranged in the tower body and divide the tower body into a wastewater liquid inlet area, a material mixing area, a mixed liquid separation area and an equipment mounting area from top to bottom, a wastewater liquid inlet is arranged at the top of the tower body, and a material outlet is arranged at the bottom of the tower body. A first communicating pipe is arranged on the side surface, close to the bottom, of the wastewater inlet area, an electromagnetic valve is arranged on the first communicating pipe, a tail end outlet of the first communicating pipe extends into the mixing area, a conical liquid distribution plate is arranged below the tail end outlet of the first communicating pipe, and the conical liquid distribution plate is fixedly connected with the tower body of the mixing area through a connecting plate; a plurality of circulating holes are formed in an outer side connecting plate of the conical liquid distribution plate, and a conical liquid distribution spray head is arranged below the conical liquid distribution plate and is communicated with an extracting agent liquid inlet pipe. The device is reasonable in structural layout, the content of phenol in wastewater is effectively reduced, the dephenolization time is shortened, and the wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an extraction and dephenolization device for treating phenol-containing wastewater. Background Art

[0002] Phenol-containing wastewater mainly comes from coking, oil refining, petrochemicals, gas power plants, chemicals, papermaking, synthetic fibers and other industries. The phenol content and characteristics of this type of wastewater vary with the type of industry, and even within the same industry, there may be differences. The water quality of phenol-containing wastewater is complex, and the main pollutants are ammonia, carbon dioxide, monophenols, polyphenols, fatty acids, etc., with a low content of hydrogen sulfide. It also contains a small amount of tar, fly ash and other substances. The wastewater has a high CODcr value and is difficult to biodegrade. Among them, phenols are particularly numerous and have high concentrations. This type of wastewater is discharged into rivers, which is harmful to aquatic organisms and crops. If the drinking water source contains phenol, it is very harmful to human health. Therefore, eliminating phenol harm is a key point in the treatment of the three wastes.

[0003] Solvent extraction is widely used in the treatment of high-concentration phenolic wastewater. Over the years, a lot of research has been done on the treatment and recovery of industrial phenolic wastewater at home and abroad, and a variety of treatment methods have been proposed and implemented. Among them, solvent extraction is a commonly used method for dephenolization of waste liquid. The extraction method is suitable for recovering phenolic substances from high-concentration phenolic wastewater (phenol concentration ≥ 1000 mg / L). Not only volatile phenol can be recovered, but also non-volatile phenol. Phenol is an important chemical raw material. It has certain economic significance to recover phenol by treating phenolic wastewater. The commonly used extractants for extractive dephenolization are benzene, heavy benzene, heavy solvent oil, substituted acetamide N503, ethyl acetate, isopropyl ether, acetophenone, trimethylol phosphate, etc.

[0004] The existing extraction dephenolization device still has deficiencies in the uniformity of mixing the extractant and the sewage, resulting in a relatively long dephenolization time and low wastewater treatment efficiency. Utility Model Content

[0005] 1. Technical problems to be solved:

[0006] In view of the above technical problems, the utility model provides an extraction and dephenolization device for treating phenol-containing wastewater.

[0007] 2. Technical solution:

[0008] A device for extracting and removing phenol from phenol-containing wastewater comprises a tower body, wherein a plurality of partitions are arranged in the tower body, and the partitions divide the tower body from top to bottom into a wastewater inlet area, a mixing area, a mixed liquid separation area and an equipment installation area, a wastewater inlet is arranged at the top of the tower body, a first connecting pipe is arranged on the side of the wastewater inlet area near the bottom thereof, a solenoid valve is arranged on the first connecting pipe, a terminal outlet of the first connecting pipe extends into the mixing area, a conical liquid distribution plate is arranged below the terminal outlet of the first connecting pipe, the conical liquid distribution plate is fixedly connected to the tower body in the mixing area through a connecting plate, a plurality of flow holes are arranged on the outer connecting plate of the conical liquid distribution plate, and a plurality of flow holes are arranged on the outer connecting plate of the conical liquid distribution plate. A conical liquid distribution nozzle is provided below the liquid plate, and the conical liquid distribution nozzle is connected to the extractant inlet pipe. A plurality of baffles are arranged at intervals up and down below the conical liquid distribution nozzle, and two adjacent baffles are staggered. A stirring paddle is provided between adjacent baffles, and the stirring paddle is fixedly connected to the rotating shaft, and the rotating shaft is connected to the driving motor in the equipment installation area; a second connecting pipe is provided on the side of the mixing zone near the bottom, and the second connecting pipe is connected to the mixed liquid feed port in the middle position of the side of the mixed liquid separation zone, an extraction liquid outlet is provided on the side of the mixed liquid separation zone near the top, and a wastewater drainage pipe is provided on the side of the mixed liquid separation zone near the bottom.

[0009] Furthermore, the conical liquid distribution nozzle includes an outer conical cover and an inner conical body, a gap for the circulation of the extractant is provided between the outer conical cover and the inner conical body, the outer conical cover and the inner conical body are connected by a plurality of fixed plates, and an opening is provided at the bottom of the outer conical cover to connect the extractant liquid inlet pipe.

[0010] Furthermore, the rotating shaft is fixed on the partition between the mixing area and the mixed liquid separation area and the mixed liquid separation area and the equipment installation area through bearings, and a sealing component is provided at the bearing position.

[0011] Furthermore, a plurality of annular fixed plates are arranged at intervals up and down on the inner wall of the tower body of the mixed liquid separation zone, and a rotating plate is arranged between adjacent fixed plates, and the rotating plate is fixed on a rotating shaft.

[0012] Furthermore, a transparent observation tube is provided on the outer side wall of the tower body of the mixed liquid separation zone, and two ends of the observation tube are respectively connected to the upper section and the lower section of the mixed liquid separation zone.

[0013] Furthermore, a heat exchange coil and a temperature sensor are provided in the wastewater inlet area.

[0014] 3. Beneficial effects:

[0015] The utility model uses a conical liquid distribution plate and a conical liquid distribution nozzle to coordinate the distribution, ensuring that the extractant and wastewater are initially mixed and then further mixed between the baffles. A stirring paddle is arranged between the baffles. After the extractant and wastewater are evenly mixed, they are further separated in the mixed liquid separation area. During separation, the rotating disk and the fixed disk cooperate to promote even mixing. The structure layout is reasonable, effectively reducing the phenol content in the wastewater, shortening the dephenolization time, and improving the wastewater treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the extraction and dephenolization device of the utility model;

[0017] Figure 2 It is a schematic diagram of the top view of the conical liquid distribution plate and the connecting plate of the utility model;

[0018] Figure 3 It is a schematic diagram of the top view of the conical liquid distribution nozzle of the utility model. DETAILED DESCRIPTION

[0019] The utility model is described in detail below in conjunction with the accompanying drawings.

[0020] As attached Figure 1 To Attachment Figure 3 As shown,

[0021] Specific embodiment: An extraction dephenolization device for treating phenol-containing wastewater comprises a tower body 1, a plurality of partitions 2 are arranged in the tower body 1, the partitions 2 divide the tower body 1 from top to bottom into a wastewater inlet area 3, a mixing area 4, a mixed liquid separation area 5 and an equipment installation area 6, a wastewater inlet port 7 is arranged on the top of the tower body 1, a first connecting pipe 8 is arranged on the side of the wastewater inlet area 3 near its bottom, a solenoid valve 9 is arranged on the first connecting pipe 8, the terminal outlet of the first connecting pipe 8 extends into the mixing area 4, a conical liquid distribution plate 10 is arranged below the terminal outlet of the first connecting pipe 8, the conical liquid distribution plate 10 is fixedly connected to the tower body 1 of the mixing area 4 through a connecting plate 11, a plurality of flow holes 12 are arranged on the outer connecting plate 11 of the conical liquid distribution plate 10, and the conical liquid distribution plate 10 is connected to the tower body 1 of the mixing area 4 through a connecting plate 11. A conical liquid distribution nozzle 13 is provided below the plate 10, and the conical liquid distribution nozzle 13 is connected to the extractant inlet pipe 14. A plurality of baffles 15 are provided below the conical liquid distribution nozzle 13, which are spaced apart from each other. Two adjacent baffles 15 are staggered, and a stirring paddle 16 is provided between adjacent baffles 15. The stirring paddle 16 is fixedly connected to a rotating shaft 17, and the rotating shaft 17 is connected to a driving motor 18 in the equipment installation area 6; a second connecting pipe 19 is provided on the side of the mixing zone 4 near its bottom, and the second connecting pipe 19 is connected to a mixed liquid feed port in the middle position of the side of the mixed liquid separation zone 5; an extracting liquid outlet 20 is provided on the side of the mixed liquid separation zone 5 near its top, and a wastewater drainage pipe 21 is provided on the side of the mixed liquid separation zone 5 near its bottom.

[0022] In actual use, wastewater enters the wastewater inlet area 3 from the top wastewater inlet 7, the solenoid valve 9 is opened, and the wastewater flows to the top of the conical liquid distribution plate 10 through the first connecting pipe 8. The wastewater is dispersed to the surroundings from the conical liquid distribution plate 10 and then flows down from the flow hole 12. The extractant flows to the conical liquid distribution nozzle 13 through the extractant inlet pipe 14 and then dispersed to the surroundings. After the wastewater and the extractant are preliminarily mixed, they enter between the baffles 15. The baffles 15 guide the mixed liquid and assist with stirring with the stirring paddle 16 to facilitate uniform mixing of the wastewater and the extractant. The mixed liquid flows into the mixed liquid separation area 5 through the second connecting pipe 19. The extractant extracts phenol from the wastewater. Due to its low density, the extractant is gradually separated from the water phase in the mixed liquid separation area 5. When it reaches the upper layer of the mixed liquid separation area 5, it gradually becomes clear and then overflows from the extractant outlet 20. Due to its high density, the extracted wastewater gradually becomes clear when it reaches the lower layer of the mixed liquid separation area 5 and then is discharged from the wastewater drain pipe 21.

[0023] The conical liquid distribution nozzle 13 includes an outer conical cover 131 and an inner conical body 132. A gap is provided between the outer conical cover 131 and the inner conical body 132 for the extraction agent to flow. The outer conical cover 131 and the inner conical body 132 are connected by a plurality of fixing plates 133. The bottom of the outer conical cover 131 is provided with an opening connected to the extraction agent inlet pipe 14. The extraction agent is guided through the gap and flows out to the surroundings, so that it can be preliminarily mixed with the wastewater flowing down from the surroundings.

[0024] The rotating shaft 17 is fixed on the partition plate 2 between the mixing area 4 and the mixed liquid separation area 5 and the mixed liquid separation area 5 and the equipment installation area 6 through the bearing 22, and a sealing component is provided at the position of the bearing 22.

[0025] A plurality of annular fixed plates 23 are arranged at intervals on the inner wall of the tower body 1 of the mixed liquid separation zone 5, and a rotating plate 24 is arranged between adjacent fixed plates 133, and the rotating plate 24 is fixed on the rotating shaft 17. When the rotating plate 24 rotates, the mixed liquid is fully stirred, and the mixing of the mixed liquid is promoted under the restriction of the fixed plate 23.

[0026] A transparent observation tube 25 is provided on the outer wall of the tower body 1 of the mixed liquid separation zone 5, and the two ends of the observation tube 25 are respectively connected to the upper section and the lower section of the mixed liquid separation zone 5. The separation of the mixed liquid in the tower can be observed through the observation tube 25, and whether the upper extract or the lower raffinate is clear.

[0027] A heat exchange coil 26 and a temperature sensor 27 are provided in the wastewater inlet area 3. By introducing a heat exchange medium into the heat exchange coil 26, the temperature of the wastewater is ensured to be around 33°, meeting the optimal extraction conditions.

[0028] Although the present invention has been disclosed as above in terms of preferred embodiments, they are not intended to limit the present invention. Anyone skilled in the art can make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection defined by the claims of this application.

Claims

1. An extraction dephenolization device for treating phenol-containing wastewater, characterized in that: The tower body comprises a tower body, wherein a plurality of partitions are arranged in the tower body, and the partitions divide the tower body from top to bottom into a wastewater inlet area, a mixing area, a mixed liquid separation area and an equipment installation area, a wastewater inlet is arranged on the top of the tower body, a first connecting pipe is arranged on the side of the wastewater inlet area near the bottom thereof, a solenoid valve is arranged on the first connecting pipe, the terminal outlet of the first connecting pipe extends into the mixing area, a conical liquid distribution plate is arranged below the terminal outlet of the first connecting pipe, the conical liquid distribution plate is fixedly connected to the tower body in the mixing area through a connecting plate, a plurality of flow holes are arranged on the outer connecting plate of the conical liquid distribution plate, and a conical liquid distribution plate is arranged below the conical liquid distribution plate A conical liquid distribution nozzle is connected to the extractant inlet pipe, a plurality of baffles spaced apart in upper and lower directions are arranged below the conical liquid distribution nozzle, two adjacent baffles are staggered, a stirring paddle is arranged between adjacent baffles, the stirring paddle is fixedly connected to the rotating shaft, and the rotating shaft is connected to the driving motor in the equipment installation area; a second connecting pipe is arranged on the side of the mixing zone near the bottom, the second connecting pipe is connected to the mixed liquid feed port in the middle position of the side of the mixed liquid separation zone, an extraction liquid outlet is arranged on the side of the mixed liquid separation zone near the top, and a wastewater drainage pipe is arranged on the side of the mixed liquid separation zone near the bottom.

2. The extraction and dephenolization device for treating phenol-containing wastewater according to claim 1, characterized in that: The conical liquid distribution nozzle includes an outer conical cover and an inner conical body, a gap for the circulation of the extractant is provided between the outer conical cover and the inner conical body, the outer conical cover and the inner conical body are connected by a plurality of fixing plates, and an opening is provided at the bottom of the outer conical cover to connect the extractant liquid inlet pipe.

3. The extraction and dephenolization device for treating phenol-containing wastewater according to claim 1, characterized in that: The rotating shaft is fixed on the partition between the mixing area and the mixed liquid separation area and the mixed liquid separation area and the equipment installation area through bearings, and a sealing component is arranged at the bearing position.

4. The extraction and dephenolization device for treating phenol-containing wastewater according to any one of claims 1 to 3, characterized in that: A plurality of annular fixed plates are arranged at intervals up and down on the inner wall of the tower body in the mixed liquid separation zone, and a rotating plate is arranged between adjacent fixed plates, and the rotating plate is fixed on a rotating shaft.

5. The extraction and dephenolization device for treating phenol-containing wastewater according to claim 4, characterized in that: A transparent observation tube is arranged on the outer side wall of the tower body of the mixed liquid separation zone, and two ends of the observation tube are respectively connected to the upper section and the lower section of the mixed liquid separation zone.

6. The extraction and dephenolization device for treating phenol-containing wastewater according to claim 5, characterized in that: A heat exchange coil and a temperature sensor are arranged in the wastewater inlet area.

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